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A Conceptual Model for a Web-scale Entity Name System Paolo Bouquet, Themis Palpanas,

A Conceptual Model for a Web-scale Entity Name System Paolo Bouquet, Themis Palpanas, Heiko Stoermer, Massimiliano Vignolo University of Trento {bouquet, themis, stoermer, vignolo}@disi.unitn.it. Naming on the web. Naming by access Naming by description Naming by direct reference.

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A Conceptual Model for a Web-scale Entity Name System Paolo Bouquet, Themis Palpanas,

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  1. ASWC 2009, Shanghai, China, 7-9 December A Conceptual Model for a Web-scale Entity Name System Paolo Bouquet, Themis Palpanas, Heiko Stoermer, Massimiliano Vignolo University of Trento {bouquet, themis, stoermer, vignolo}@disi.unitn.it

  2. ASWC 2009, Shanghai, China, 7-9 December Naming on the web • Naming by access • Naming by description • Naming by direct reference

  3. ASWC 2009, Shanghai, China, 7-9 December Semantic webURIs = identifiers for resources • Web resources http://dbpedia.org/page/Vienna HTML page http://dbpedia.org/data/Vienna RDF dataset • Non-Web resources http://dbpedia.org/resource/Vienna The city, the capital of Austria

  4. ASWC 2009, Shanghai, China, 7-9 December Naming web resourcesNaming by access Web resource URI accesses “http://dbpedia.org/data/Vienna“ http://dbpedia.org/data/Vienna The URI provides a causal pathway to the named thing, mediated by the Web

  5. ASWC 2009, Shanghai, China, 7-9 December Naming non-web resourcesNaming by description The URI for a non-web resource redirects to a URI naming (by access) a web resource that gives a description of the non-web resource.

  6. ASWC 2009, Shanghai, China, 7-9 December Semantic URI and naming by description Semantic URI URI redirect to “http://dbpedia.org/data/Vienna” “” Naming by description Naming by access http://dbpedia.org/data/Vienna Vienna describe RDF dataset Non-web resource

  7. ASWC 2009, Shanghai, China, 7-9 December QUESTION: Does the Semantic Web need a third NAMING relation? CLAIM: It does.

  8. ASWC 2009, Shanghai, China, 7-9 December ARGUMENT FOR THE CLAIM SCENARIO 1) Let @ be a vocabulary for describing accademic positions: @:affiliation @:teaching 2) Suppose John works at the university UNI1 and at the university UNI2. 3) Let be the dataset describing John's profile at UNI1. 4) Let be the dataset describing John's profile at UNI2.

  9. ASWC 2009, Shanghai, China, 7-9 December Two datasets http://UNI1/data/John http://UNI2/data/John Philosophy of language UNI1 UNI2 Logic @:affiliation @:teaching @:affiliation @:teaching http://UNI1/resource/John http://UNI2/resource/John

  10. ASWC 2009, Shanghai, China, 7-9 December Linking data with owl:sameAS http://UNI1/data/John http://UNI2/data/John http://UNI2/resource/John http://UNI1/resource/John owl:sameAs owl:sameAs http://UNI1/resource/John http://UNI2/resource/John

  11. ASWC 2009, Shanghai, China, 7-9 December Merge of the two datasets  http://UNI1/data/John http://UNI2/data/John Philosophy of language UNI1 UNI2 Logic @:affiliation @:teaching @:affiliation @:teaching http://UNI1/resource/John http://UNI2/resource/John

  12. ASWC 2009, Shanghai, China, 7-9 December Query: Where does http://UNI1/resource/John teach and what? (<x, y> : http://UNI1/resource/John @:affiliation x  http://UNI1/resource/John @:teaching y)

  13. ASWC 2009, Shanghai, China, 7-9 December Results <University1, Philosophy of Language> <University2, Philosophy of Language> <University2, Logic> <University1, Logic> The wrong results are entailed from the semantics of owl:sameAs

  14. ASWC 2009, Shanghai, China, 7-9 December • Solution • Use Entity Name System (ENS) for linking datasets • Global ENS identifiers for non-web resources • The property ens:corefer

  15. ASWC 2009, Shanghai, China, 7-9 December ENS identifiers and ens:corefer http://UNI1/data/John http://UNI2/data/John ens:resource/John end:resource/John ens:corefer ens:corefer http://UNI1/resource/John http://UNI2/resource/John

  16. ASWC 2009, Shanghai, China, 7-9 December merge http://UNI1/data/John http://UNI2/data/John Philosophy of language Logic UNI2 UNI1 @:affiliation @:teaching @:affiliation @:teaching http://UNI1/resource/John http://UNI2/resource/John ens:corefer ens:corefer ens:resource/John ens:data/John

  17. ASWC 2009, Shanghai, China, 7-9 December Collecting information about John 1. Query (x:x ens:corefers ens:resource/John) 2. Results {, } 3. Merge the datasets  4. Make queries on the merge of the datasets Who teaches what and where? (<x, y, z>: x @:affiliation y  x @:teaching z)

  18. ASWC 2009, Shanghai, China, 7-9 December Results http://UNI1/resource/John, University1, Philosophy of Language http://UNI2/resource/John, University2, Logic

  19. ASWC 2009, Shanghai, China, 7-9 December CLAIM ENS identifiers name non-web resources by direct reference.

  20. ASWC 2009, Shanghai, China, 7-9 December Naming by direct reference  naming by description? Architecture of the Web Pragmatic of the Web NO YES

  21. ASWC 2009, Shanghai, China, 7-9 December ENS identifiers and naming by direct reference URI ENS identifier redirect to “ens:resource/John” “ens:data/John” Naming by description Naming by access Naming by direct reference John's profile ENS repository John describe ? RDF Dataset Non-web resource

  22. ASWC 2009, Shanghai, China, 7-9 December ENS identifiers and naming by direct reference ENS identifier URI redirect to “ens:data/John” “ens:resource/John” Naming by access Naming by direct reference ENS John's profile John fix the reference RDF Dataset Non-web resource

  23. ASWC 2009, Shanghai, China, 7-9 December Fixing the reference The man drinking martini is handsome The man drinking martini is a computer scientist

  24. ASWC 2009, Shanghai, China, 7-9 December Fixing the reference http://UNI1/data/John http://UNI2/data/John linked http://UNI1/resource/John http://UNI2/resource/John describe the same entity John ens:corefer ens:corefer ens:resource/John ens:data/John

  25. ASWC 2009, Shanghai, China, 7-9 December • Pragmatic role of ENS identifiers • Use ens:resource/John and the ens:corefer property for linking different datasets about John. • Use the query (x: x ens:corefer ens:resource/John) to search all datasets about John and to make the merge of those datasets.

  26. ASWC 2009, Shanghai, China, 7-9 December Thank you

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